Smoke-consumer



W. D. SMITH, DECD.

0. sum. umvsnsm. LEGATEE.

SMOKE CONSUMER.

APPLICATION FILED MAY27,19|8.

Patented Aug. 23, 1921.

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W. D. SMITH, DECD.

c sum, UNIVERSAL LEGATEE.

SMOKE CONSUMER.

APPLICATION FIL'ED MAYZT. l9l8.

Patenwd Aug. 23, 1921.

2 SHEETS-SHEET 2.

- aziz-zzzzam lfifmssses "UNITED I STATES PATENT OFFICE.

WILLIAM D. SMITH, OF MONTREAL, QUEBEC, CANADA; CECILIA SMITH, UNIVERSALLEGATEE THE ESTATE OF SAID WILLIAM B. SMITH, DECEASED. I

SMOKE-CONSUMER.

To all whom it may concern:

Be it known that 1, WILLIAM D. SMITH, a subject of the King of GreatBritain, and resident of the city of Montreal, in the Province of Quebecand Dominion of Canada, have invented certain new and usefulImprovements in Smoke-Consumers, of which the following is a full,clear, and exact description.

This invention relates to improvements in smoke prevention apparatus forfurnaces, and the object is to provide means for preventing the escapefrom the furnace of the carbon particles which blacken the smoke.

A further object is to increase the efficiency of the fuel by promotinga more perfect combustion of the same, and at the same time retardingthe escape of hot gases from the furnace.

The means used to attain these objects are essentially a baflle wall atthe rear of the usual bridge wall extending downwardly from the top ofthe boiler casing to approximately the level of the top of the bridgewall, and a steam sprayer adapted to supply oxygen over the fire and atthe same time retard the draft.

In the drawings which illustrate this in-' vention:-

Figure 1 is a vertical longitudinal section of a boiler furnace arrangedas hereinafter described.

Fig. 2 shows on the left a partial front elevation and on'the right apartial transverse section on the line 56 of Fig. 1.

lower bricks.

Fig. 4 is a front elevation partly in section of one of the hangingbricks.

Fig. 5 is a perspective sectional view of one of the sprayers.

Fig. 6 is a vertical longitudinal section of a locomotive boilerequipped with the device.

Fig. 7 is a similar view of a marine boiler equipped with the device.

In the drawings, 11 designates a boiler which in Fig. '1 is of theexternally fired tubular type in the usual brick casing walls 12, andprovided with a furnace 13 of ordinary t pe having at the back a' bridgewall 14 "VV hen the present invention is installed,

Fig. 3 is a perspective view of one of the Specification of LettersPatent. Patented Aug, 23, 19 21,

Application filed May 27,

1918. Serial No. 236,907.

it is preferable to slope the top of the bridge wall at the rear, asshown in Fig. 1. Above the bridge wall and slightly to the rear thereof,a hanging bridge 15 is located, extending from'side to side of theboiler casing. This bridge preferably consists of a series of verticallydisposed bricks 16, slotted at the upper end so as to be suspended froma bar 17 the ends of which are embedded in the casing walls,-and'at thesame time protect the bar from fire and prevent warping thereof. Thesebricks 16 are each clamped'between two iron plates 18 by means of bolts19, the plates being provided with pockets 20 for bolt-heads and nuts,which pockets engage in suitable apertures in the brick. The plates arein addition provided with ribs 21 of any suitable number andarrangemenuwhich are embedded in the brick. It will thus be seen thateach brick is supported from top to bottom by the exists between thesides of the boiler and the casing, this space is closed up from the topof the hanging bridge to the top of the casing. These baffle walls,designated 22, are composed of horizontal bricks23, one end of eachbrick or row of bricks being curved to fit closely against the boiler.The lower brick 24 on each of the walls is preferably in one piece andformed with a rectangular aperture 25 extending longitudinallytherethrough. These lower bricks are preferably of such length that theymay be embedded at one end in the casing wall. The inner ends of thebricks 24 and the weight of the walls built thereon are supportedby'metal the portion of each wall above the horizontal diameter of theboiler acts as a keystone, and supports the portion below by means ofthe bars 26.

At the front of the furnace, a pair ofapertures are formed one on eachside of the center and each lined with a sleeve 28, having an aperturedcross bar 29 at the mouth thereof supporting a pipe 30 carrying asprayer 31 within the sleeve. The pipes 30 are connected to a header 32,which is in turn connected to a steam pipe 33 having a valve 34 therein.The connection between the header 32 and pipe 33 is preferably such thatit may be adjusted to'alter the height of the header and thus to alterthe inclination of the pipes 30 and the direction of the steam jetsissuing from the sprayers 31. The sprayers each consist of asubstantially sector-shaped hollow body attached at the small end to thepipe 30, and provided on the curved edge with a plurality of smallapertures 35. these'sprayers is such that the line of blast passesbetween the standing and hanging brid es, as indicated by the line ofarrows 36 in Fig. 1. In addition to these sprayers,longitudinal'apertured pipes 37 may be embedded in the side walls of thefurnace, and

i supplied from the steam pipe 33, valves 38 being provided to controlflow independently of the sprayers. In Fig. 6, the invention is shownapplied to a locomotive boiler. The hanging bridge 15 may be placed inany suitable position, and made of a size in accordance with thedimensions and proportion of the furnace. The bridge may be hung'rightup to the crown sheet of the furnace, similarly to Fig. 1, or a shortdistance below the crown sheet, the intervening space being either freeor closed by a wall 22. The sprayers are let into the front of thefurnace and are preferably formed similarly to the fire door opening, asshown in dotted lines. I

In Fig. 7, the invention is shown applied to a marine boiler or anyboiler of the internally fired return tubular type, the installationbeing identical with that shown for the stationary and locomotiveboilers. It will also be noted that in the internally fired types ofboiler. the longitudinal blast pipes 37 will require to be inclosed in abrick casing 40, to prevent their being burned. The arrangement of steampipes for both front and side sprayers will be the same as shown inconnection with a stationary boiler.

In all the forms, the hanging bridge and walls above it if such existwill prevent any up-draft and force escaping gases to travel in closeproximity to the fire. The blast from the front and side sprayers formsa curtain of steam over the fire, which aids in keeping the gases down.Moreover, the steam readily decomposes in the great heat and yieldsoxygen with which the incan- The preferable adjustment of cooled, isdriven back against the fire with sufiicient oxygen supplied to supportcombustion, so that the products of combustion leaving the furnace arealmost entirely free from carbon particles, which impart the heavy blackcolor to the smoke.

In addition to eliminating or greatly reducing the smoke, the fuel ismore perfectly consumed, and the draft being retarded by the hangingbridge wall is longer in passing through the boiler tubes, and thereforehas more opportunity to yield up heat. Carbon deposits in the tubes arealso prevented, so that more of the heat reaches the water.

Having thus described my invention, what I claim is 1. In a device ofthe class described, the combination with a boiler and furnace, of ahanging bridge at the back of the furnace composed of verticallydisposed bricks, plates on each side of each brick bolted togetherthrough-the bricks, and a bar supporting all of said bricks.

2. In a device of the class described, the combination with a boiler andits furnace, of a bridge wall near the rear of the furnace disposed tohold the draft down in proximity with the fire, said bridge comprising abar passing out of the furnace at the sides thereof, a plurality ofbricks slotted at their upper ends to engage said bar, plates onopposite sides of each brick, bolts connecting said plates togetherthrough the brick, hollow bosses embedded in the brick formed on saidplates for the reception of bolt heads and nuts and ribs on said platesembedded in the brick and arranged to hold the bricks againstdisintegration.

3. In a device of the class described, the

combination with a boiler, and furnace hav.-'

ing a standingbridge wall at the rear thereof, of a hanging bridgewall'at the reariof said standing bridge wall comprising a transversebar embedded at its ends in the furnace side walls, a series ofvertically disposed bricks recessed at their upper ends to receive saidbar and adaptedfto be independently hooked on to and unhooked from saidbar, and transverse walls above said hanging bridge wall filling thespace between the boiler and easing, the lower edge of said hanging-bridge wall being on a level with the top of the. standing bridge wall.

4. In a device of the class described, the combination with a boiler andfurnace, of a hanging bridge at the rear of the furnace,

transverse walls above said hanging bridge intermediate bricks betweenthe upper and wall closing the space between the boiler and lowerbricks.

its casing above the hanging bridge Wall, In witness whereof, I havehereunto set said transverse Walls comprising lower my hand, in thepresence of two witnesses. tubular bricks, a bar passing through saidWILLIAM D. SMITH. bricks and following the contour of the Witnesses:

boiler, bricks above the horizontal center of S. R. W. ALLEN,

the boiler holding said bar in position, and G. M. MORELAND.

